How x was transfered to a ? That confuses me. And they're different intergers :/

Answer 1

Post the code here. We have no idea what you're talking about.

Answer 2

in addition to call a function we can also pass data. there are two ways by which you can pass the data..pass by value and reference...it is default that actual parameters get copied to formal parameters on one-to-one basis when a function is called..you can also use same variables for actual and formal parameters because scope of the variable is only within the block in which it is declared..hope it clarifies your doubt..